SRAM Red Cassette & Rest is Ultegra - Is this okay?

I realize there are lots of threads out there on this. But I just want to make sure…

Is it okay to run my SRAM Red cassette with my Shimano Ultegra groupset?

Cassette: SRAM Red
RD: Ultegra
FD: Ultegra
Chain: Shimano (Ultegra or Dura Ace, can’t remember)

yes
.

that’s my training setup, been working perfectly since last august.